Application stops responding and does 100% load of one processor core.

For instance, at <img src="image.png" width="1" height="1" />

Or at html code with improper html. I observered several times when KeepNote broke html code, inserting double quotes inside another double quotes (such as style="font-family:"...""), or breaking html elements hierachy (unclosed tags etc.).

Application hangs up after switching to another tab and then back to problematic one, or restarting application with problematic tab being chosen. The only way to open problematic document is to manually locate the problem in html code, that is quite uneasy for large pages.

Besides, copying problematic page or tree with problematic page (user may even not suspect of the problem, so as he never revisited the problematic page) destroys the page contents (destination page is created reduced in size, while source page is destroyed).

Keepnote 0.7.3.1 Python 2.7 Firefix 4.0 openSUSE Linux 11.4

This is now fixed in keepnote-0.7.6. Thanks for reporting this bug.